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2025-01-06 20:37 本頁面
【正文】 Radiocarbon Dating Nowadays scientists can answer many questions about the past through a technique called radiocarbon (放射性碳 ), or carbon14, dating. One key to understanding how and by something happened is to discover when it happened. Radiocarbon dating was developed in the late 1940s by physicist Willard F. Libby at he University of Chicago. An atom of ordinary carbon, called carbon12, has six protons(中子 ) and six neutrons (質(zhì)子 ) in its nucleus. Carbon14, or C14, is a radioactive, unstable form of carbon that has two extra neutrons (原子核 ). It returns
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